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Molecular sled is an eleven-amino acid vehicle facilitating biochemical interactions via sliding components along DNA #MMPMID26831565
Mangel WF; McGrath WJ; Xiong K; Graziano V; Blainey PC
Nat Commun 2016[]; 7 (ä): ä PMID26831565show ga
Recently, we showed the adenovirus proteinase interacts productively with its protein substrates in vitro and in vivo in nascent virus particles via one-dimensional diffusion along the viral DNA. The mechanism by which this occurs has heretofore been unknown. We show sliding of these proteins along DNA occurs on a new vehicle in molecular biology, a ?molecular sled' named pVIc. This 11-amino acid viral peptide binds to DNA independent of sequence. pVIc slides on DNA, exhibiting the fastest one-dimensional diffusion constant, 26±1.8 × 106 (bp)2?s?1. pVIc is a ?molecular sled,' because it can slide heterologous cargos along DNA, for example, a streptavidin tetramer. Similar peptides, for example, from the C terminus of ?-actin or NLSIII of the p53 protein, slide along DNA. Characteristics of the ?molecular sled' in its milieu (virion, nucleus) have implications for how proteins in the nucleus of cells interact and imply a new form of biochemistry, one-dimensional biochemistry.